Cephalexin Diketopiperazine (Na Salt) | CAS 62673-90-9 | é uma impureza conhecida de cephalexina originada por ciclização intramolecular e desidratação durante síntese | purificação ou armazenamento. Esta impureza apresenta propriedades físico-químicas distintas | incluindo menor solubilidade e estabilidade térmica alterada | que podem afetar perfil de pureza e ensaios de estabilidade. A detecção e quantificação exigem métodos analíticos robustos como HPLC com detector UV | LC-MS e NMR para identificação estrutural e quantificação em limites de especificação. O controlo processual e validação de métodos são essenciais para minimizar formação | estabelecer limites de aceitação e assegurar conformidade regulatória em estudos de desenvolvimento e liberação de lotes.
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